Reactive chemicals differential thermal analysis

ASSESSMENT OF REACTIVE CHEMICAL HAZARDS COMPUTATION OF REACTIVE CHEMICAL HAZARDS DIFFERENTIAL SCANNING CALORIMETRY DIFFERENTIAL THERMAL ANALYSIS MAXIMUM REACTION HEAT REACTION SAFETY CALORIMETRY... 

Potential hazards (flammability, corrosivity, etc.) are reviewed to identify concerns regarding the storage and handling of reactive chemicals, and information is obtained from raw material suppliers (e.g., technical bulletins). Flashpoint, DSC, or differential thermal analysis (DTA) testing is typically done by the customer. 

ASSESSMENT OE REACTIVE CHEMICAL HAZARDS CHEMICAL STABILITY/REACTIVITY ASSESSMENT DIFFERENTIAL SCANNING CALORIMETRY (DSC) DIFFERENTIAL THERMAL ANALYSIS (DTA)... 

Since most of the physical properties of the asphaltenes did not show any major differences, thermal reactivity was investigated to discern any differences which might exist in chemical reactivity. Differential scanning calorimetry and thermogravi-metric analysis as well as rapid pyrolysis were employed. The only notable features of the DSC analyses were what appeared to be glass transitions occurring at 175°C and 172°C for the crude and residuum asphaltenes, respectively. The TGA curves for the two materials were also virtually identical, differing by less than one percent volatile matter at any temperature. Both of these techniques thus indicate essentially no discemable differences in the two asphaltenes. 

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